Improved child luggage stroller

Abstract

This utility model discloses an improved children's luggage stroller, including a box, a front frame, and a rear frame; wheels are provided at the lower ends of both the front and rear frames; a seat and armrests are fixedly mounted on the front frame, and a handle is also provided at the upper end of the front frame; the rear frame is rotatably connected to the seat and can be extended or folded; a locking device is provided on the bottom surface of the seat; the locking device includes a first button located near the rear frame and a locking tongue that can be elastically extended and retracted by the first button; a corresponding locking groove is provided on the upper surface of the box; the locking tongue extends downward and inserts into the locking groove to lock the box to the front frame. By placing the locking device connecting the box and the front frame under the seat, this utility model can maintain the smooth surface of the seat, improving the child's riding comfort; it can also prevent accidental activation of the button operation area, improving safety performance while ensuring that operation does not affect the child's normal riding.

Description

Technical Field

[0001] This utility model belongs to the technical field of children's luggage cart structure, and particularly relates to an improved children's luggage cart. Background Technology

[0002] Currently, suitcases on the market, besides their basic storage function, have also developed various auxiliary functions to free people's hands, such as suitcases that can carry children. A Chinese utility model patent with patent number CN202420893234.2 discloses a multifunctional seatable trolley suitcase, including a suitcase body, frame, seat, locking assembly, pull handle, front wheel assembly, and rear wheel assembly. The suitcase body is detachably connected to the frame for carrying travel items; the seat is fixed in the middle of the frame for children to sit on; the locking assembly is installed on the suitcase body, and the suitcase body and seat can be combined and separated by operating the locking assembly. This utility model suitcase can not only carry children but also solves the technical problem of combining and separating the suitcase body and frame without moving the child. However, this patent still has many shortcomings. First, in the luggage industry, suitcases are usually made using injection molding, so the suitcase body and locking assembly need to be processed separately before assembly. This assembly method complicates the design of the suitcase to fit the installation structure, increasing manufacturing difficulty and requiring adjustments in material selection and shape design, ultimately reducing the variety of suitcases available. Secondly, as shown in the attached drawings of the patent specification, the unlocking position of the locking component is located behind the seat. Since children cannot remain still on the seat at all times, the unlocking position is easily touched, which may not only cause discomfort to the child but also pose a risk of accidental unlocking of the suitcase. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the present invention aims to provide an improved children's luggage stroller based on the existing technology.

[0004] The purpose of this utility model is achieved as follows: An improved children's luggage stroller includes a body, a front frame, and a rear frame; wheels are provided at the lower ends of both the front and rear frames; a seat and armrests are fixedly mounted on the front frame, and a handle is also provided at the upper end of the front frame; the rear frame is rotatably connected to the seat and can be kept in an unfolded or folded state; a locking device is provided on the bottom surface of the seat; the locking device includes a first button located near the rear frame and a locking tongue that can be elastically extended and retracted up and down by the first button; a corresponding locking groove is provided on the upper surface of the body; the locking tongue extends downward and inserts into the locking groove to lock the body to the front frame.

[0005] Preferably, the locking device includes a locking housing, a button connector, and a first spring; the locking housing has an internal accommodating cavity, a button hole near the rear frame, and a latch hole near the upper surface of the housing; one end of the button extends from the button hole, and the other end is driven to connect with the button connector in the accommodating cavity; the button connector has a first inclined surface; the latch has a second inclined surface that cooperates with it; through the cooperation of the first and second inclined surfaces, the latch can extend and retract back and forth in the latch hole; one end of the first spring abuts against the accommodating groove, and the other end is connected to the button connector to drive the button to reset.

[0006] Preferably, the first button, the button connector, and the locking tongue are a pair and are controlled independently.

[0007] Preferably, the upper end of the button connector is provided with a column portion for the first button assembly; the lower end is provided with a frame portion; a spring column that can be inserted into the frame portion is formed inside the locking housing; one end of the first spring abuts against the spring column, and the other end abuts against the inner side of the upper end of the frame portion; the first inclined surface is symmetrically distributed on the left and right inner sides of the frame portion and is located below the spring column.

[0008] Preferably, the locking housing includes a locking base and a locking cover; the bottom surface of the chair seat has a recessed locking position, and the locking housing is installed on the locking position by fastening screws.

[0009] Preferably, it further includes a pivot and a second button assembly; the rear frame is fixedly provided with a rotating seat; the seat has a pivot portion; the rotating seat is pivotally connected to the pivot portion via the pivot, and the second button assembly is disposed on the pivot portion to control the rotation or braking of the rotating seat.

[0010] Preferably, the rotating seat is provided with a guide hole; the cross-sectional shape of the guide hole is that the bottom of several vertical waist-shaped holes are connected by a horizontal waist-shaped hole, and the center lines of the vertical waist-shaped holes in the length direction are intersecting. The pivot section is provided with a pivot section waist-shaped hole adapted to the shape of the vertical waist-shaped hole; the second button assembly includes a second button, a second spring and a connecting rod; the second button is provided with a connecting rod hole, and the connecting rod passes through the connecting rod hole and the pivot section waist-shaped hole and is inserted into the guide hole.

[0011] Preferably, the second button assembly has a pair and is independently controlled; the rotating base has symmetrically distributed guide holes; the rotating shaft has symmetrically provided button slots at the upper and lower ends of its circumferential sidewalls; one end of the second spring abuts against the button slot, and the other end is connected to the second button.

[0012] Preferably, the wheel at the lower end of the rear frame is a brake wheel.

[0013] Preferably, the handrail is provided with a hanging groove.

[0014] Compared with existing technologies, this invention places the locking connection device between the car body and the front frame under the seat. This maintains the smoothness of the seat surface, significantly improving the child's riding comfort. Furthermore, it prevents accidental activation of the button operation area, ensuring that operation does not interfere with the child's normal riding while effectively improving safety. Secondly, the locking device has a pair of independently controlled buttons, further reducing the risk of accidental activation. This invention also discloses a specific structure for the rotatable connection between the rear frame and the front frame. A button controls the linkage to move within a guide hole, enabling the switching of the rear frame during folding and extension. The structure is stable and effective, and has broad application prospects. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of an embodiment of the present utility model; Figure 2 This is an enlarged view of part A of an embodiment of the present utility model; Figure 3 This is a schematic diagram of the installation of the locking device and the chair seat according to an embodiment of the present utility model; Figure 4 This is a schematic diagram of the installation of the locking device according to an embodiment of the present invention (the first spring is not shown). Figure 5 This is a schematic diagram of the internal structure of the locking device after assembly according to an embodiment of the present utility model (the first spring on the right is not shown). Figure 6 This is a schematic diagram of the installation of the chair seat and one side rotating seat in an embodiment of the present utility model (the installation method of the other side rotating seat is the same). Figure 7 This is a front view of the rotating seat according to an embodiment of the present utility model (arrows are used to indicate the movement trajectory of the upper and lower connecting rods after the second button is pressed once). Figure 8 This is a perspective view of the rotating seat according to an embodiment of the present utility model; Figure 9 This is a perspective view of the second button in an embodiment of the present invention; Figure 10 This is a top view of a chair seat equipped with a second button assembly and a locking device in an embodiment of the present invention. Figure 11 This is a sectional view along the BB direction. (To facilitate observation of the structural details of each component, only the second button at the upper end of the pivot is shown in the figure, and only a second spring is installed below the second button.) Figure 12 This is a partial schematic diagram of the front frame of an embodiment of the present invention. Detailed Implementation

[0016] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0017] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0018] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0019] like Figure 1-5 As shown in the figure, this embodiment discloses an improved children's luggage stroller, including a box (not shown in the figure), a front frame 1, and a rear frame 2; both the front frame 1 and the rear frame 2 are equipped with wheels 3 at their lower ends, and the wheels of the rear frame 2 are brake wheels 30, which allows the stroller to stop moving at any time, providing users with more functional convenience. The braking structure of the brake wheel 30 is a mature technology in this field and will not be described in detail here.

[0020] The front frame 1 is fixedly equipped with a seat 13 and an armrest 12, and a handle 11 is also provided at the upper end of the front frame 1. The rear frame 2 is rotatably connected to the seat 13 and can be kept in an unfolded or folded state. A locking device 4 is provided on the bottom surface of the seat 13. The locking device 4 includes a first button 41 located near the rear frame and a locking tongue 42 that can be elastically extended and retracted by the first button. In the prior art, the seat 13 is usually embedded in the upper surface of the housing. As shown in the attached drawings, the surface of the seat 13 in this embodiment is smooth, and when embedded in the housing, it can remain flush with the non-embedded part of the upper surface of the housing, further improving the comfort of the child sitting. Since the user (adult) usually stands at the back of the stroller (near the rear frame 2), the first button 41 in this embodiment is installed near the rear frame 2, which makes it easy for the user to disassemble or install the housing without affecting the child's sitting. At the same time, the location where the first button 41 is installed is not easily touched by the child while sitting, greatly improving safety.

[0021] Furthermore, in this embodiment, the locking tongue 42 adopts an insertion structure to achieve locking. Specifically, a locking groove is correspondingly provided on the upper end face of the housing; the locking tongue 42 extends downward and inserts into the locking groove, so that the housing is mounted on the front frame 1, achieving locking between the housing and the front frame 1; conversely, when the locking tongue 42 retracts upward, it exits the locking groove, achieving separation between the housing and the front frame 1. Since the insertion structure for locking is a common detachable connection method in the mechanical field and is widely used in this field, this embodiment does not show a schematic diagram of the housing, the locking groove, and the locking tongue extending into the locking groove. The innovative focus of this embodiment is on the specific structure of the locking device and the installation position of the first button and the locking tongue.

[0022] In practice, the bottom of the box is also rotatably mounted or directly mounted on the crossbar 18 at the lower end of the front frame (the two ends of the crossbar 18 are used to set two wheels 3). This technology is a relatively mature technology in the field, and it is also recorded in the prior art mentioned in the background art, so it will not be elaborated here.

[0023] More specifically, the locking device 4 includes a locking housing 43, a button connector 44, and a first spring 45. The locking housing 43 has an internal accommodating cavity, a button hole 433 near the rear frame 2, and a latch hole 434 near the upper surface of the housing. One end of the first button 41 extends from the button hole 433, and the other end is driven to connect with the button connector 44 within the accommodating cavity. The button connector 44 has a first inclined surface 443. The latch 42 has a second inclined surface 421 that cooperates with it. Through the cooperation of the first inclined surface 443 and the second inclined surface 421, the latch 42 can extend and retract within the latch hole 434. One end of the first spring 45 abuts against the accommodating groove, and the other end is connected to the button connector 44 to drive the first button 41 to reset. This embodiment includes a pair of first buttons 41, a pair of button connectors 44, and a pair of latches 42, which form two independent control units. The two control units serve as a safety feature; the housing can only be disassembled or installed when both first buttons 41 are operated simultaneously, effectively preventing accidental activation. More specifically, in this embodiment, when the user presses down on the two first buttons 41, the first inclined surface 443 slides downwards and engages with the second inclined surface 421, causing the locking tongue 42 to retract inwards and exit the locking groove. When the user releases the first button 41, the button resets, and the locking tongue 42 extends outwards.

[0024] More specifically, such as Figure 4-5 As shown, the button connector 44 has a column portion 441 at its upper end for mounting the first button 41; a frame portion 442 at its lower end; a pair of spring columns 435 that can be inserted into the frame portion 442 are formed inside the locking housing 43; there is a pair of first springs 45, one end of which abuts against the spring column 435, and the other end abuts against the inner side of the upper end of the frame portion 442; the first inclined surfaces 443 are symmetrically distributed on the left and right inner sides of the frame portion 442 and are located below the spring columns 435. In this embodiment, a pair of first springs is configured for each control unit, which can optimize the stress state, improve structural stability, and extend the service life of the springs to ensure long-term structural stability.

[0025] More specifically, to facilitate the installation of the locking device 4, the locking housing 43 in this embodiment consists of a locking base 431 and a locking cover 432, which are fixedly connected by fastening screws after the components are installed. The bottom surface of the chair seat 13 has a recessed locking position 130. The fixedly connected locking housing 43 is installed on the locking position 130 by fastening screws, achieving concealed installation and flexibly adapting to the spatial layout.

[0026] Furthermore, such as Figure 6-11As shown, this embodiment discloses a specific structure for maintaining the folded and unfolded states of the rear frame 2: it includes a pivot 14 and a second button assembly; the rear frame 2 is fixedly provided with a rotating seat 20; the seat 13 forms a pivot portion 131; the rotating seats 20 on both sides are pivotally connected to the pivot portion 131 via the pivot 14, thereby realizing the rotatable connection between the rear frame 2 and the seat 13. The second button assembly is disposed on the pivot portion 131 to control the rotation or braking of the rotating seat 20, thereby controlling the folding and unfolding of the rear frame 2.

[0027] Similarly, as a precaution, this embodiment has two sets of second button components, each controlled independently. The rear frame 2 can only rotate relative to the front frame 1 when both button components are operated simultaneously.

[0028] More specifically, two guide holes 21 are symmetrically opened on the rotating seat 20. The cross-sectional shape of the guide holes 21 is that the bottom of the two vertical waist-shaped holes 211 are connected by a horizontal waist-shaped hole 212, and the center lines of the vertical waist-shaped holes 211 in the length direction are intersecting. The rotating shaft portion 131 has symmetrically provided button slots 132 at its upper and lower ends on its circumferential sidewalls. The rotating shaft portion 131 also has a rotating shaft hole 133 at its midpoint along its length for inserting the rotating shaft 14. Opposite waist-shaped holes 134 are provided above and below the rotating shaft hole 133, the shape of which matches the shape of the vertical waist-shaped hole 211 of the guide hole 21. The second button assembly includes a second button 15, a second spring 16, and a connecting rod 17; the second button 15 has a connecting rod hole 150, and the connecting rod 17 passes through the connecting rod hole 150 and the waist-shaped hole 134 before being inserted into the guide hole 21. One end of the second spring 16 rests against the button slot 132, and the other end is connected to the second button 15. In this embodiment, when the rear frame 2 is in a non-rotatable state, the connecting rod 17 is located inside one of the two vertical oblong holes 211, and under the elastic force of the second spring 16, the connecting rod 17 is located at the top of the vertical oblong hole 211, achieving locking. When the two second buttons 15 are pressed simultaneously, the connecting rod 17 moves to the lower end of the vertical oblong hole 211. Since the transverse oblong hole 212 connects the two vertical oblong holes 211, the connecting rod 17 can slide from one vertical oblong hole to the other. This process is the rotation process of the rear frame 2. The rotatable range of the rear frame 2 is the angle between the top of the two vertical oblong holes 211 and the line connecting the center of the rotating seat.

[0029] In this embodiment, a second button 15 is configured with a pair of second springs 16, which has the same advantages as the configuration scheme of the first spring.

[0030] Furthermore, in some embodiments, more than two vertical waist-shaped holes can be provided for the guide hole. This design enables multi-level rotation of the rear frame to adapt to different user needs.

[0031] like Figure 12 As shown, the armrest 12 in this embodiment also has hanging grooves 120 on both sides, which makes it convenient for users to hang items.

[0032] For those skilled in the art, various other corresponding changes and modifications can be made based on the technical solutions and concepts described above, and all such changes and modifications should fall within the protection scope of the claims of this utility model.

Claims

1. An improved children's luggage stroller, comprising a box body, a front frame, and a rear frame; wheels are provided at the lower ends of both the front and rear frames; a seat and armrests are fixedly mounted on the front frame, and a handle is also provided at the upper end of the front frame; characterized in that, The rear frame is rotatably connected to the seat and can be unfolded or folded. The bottom surface of the seat is provided with a locking device. The locking device includes a first button located near the rear frame and a locking tongue that can be elastically extended and retracted by the first button. The upper end of the housing is provided with a corresponding locking groove. The locking tongue extends downward and inserts into the locking groove to lock the housing to the front frame.

2. An improved children's luggage stroller according to claim 1, characterized in that, The locking device includes a locking housing, a button connector, and a first spring. The locking housing has an internal cavity, a button hole near the rear frame, and a latch hole near the upper surface of the housing. One end of the button extends from the button hole, and the other end is connected to the button connector within the cavity. The button connector has a first inclined surface. The latch has a second inclined surface that mates with it. Through the interaction of the first and second inclined surfaces, the latch can extend and retract within the latch hole. One end of the first spring rests against the accommodating groove, and the other end is connected to the button connector to drive the button to reset.

3. An improved children's luggage stroller according to claim 2, characterized in that, The first button, the button connector, and the locking tongue are each a pair and are controlled independently.

4. An improved children's luggage stroller according to claim 2, characterized in that, The upper end of the button connector is provided with a column portion for the first button assembly; the lower end is provided with a frame portion; a spring column is formed inside the locking housing that can be inserted into the frame portion; one end of the first spring abuts against the spring column, and the other end abuts against the inner side of the upper end of the frame portion; the first inclined surface is symmetrically distributed on the left and right inner sides of the frame portion and is located below the spring column.

5. An improved children's luggage stroller according to claim 4, characterized in that, The locking housing includes a locking base and a locking cover; the bottom surface of the chair seat has a recessed locking position, and the locking housing is installed on the locking position by fastening screws.

6. An improved children's luggage stroller according to any one of claims 1-5, characterized in that, It also includes a pivot and a second button assembly; the rear frame is fixedly provided with a rotating seat; the seat has a pivot portion; the rotating seat is pivotally connected to the pivot portion via the pivot, and the second button assembly is disposed on the pivot portion to control the rotation or braking of the rotating seat.

7. An improved children's luggage stroller according to claim 6, characterized in that, The rotating seat is provided with a guide hole; the cross-sectional shape of the guide hole is that the bottom of several vertical waist-shaped holes are connected by a horizontal waist-shaped hole, and the center lines of the vertical waist-shaped holes in the length direction are intersecting. The pivot section is provided with a pivot section waist-shaped hole adapted to the shape of the vertical waist-shaped hole; the second button assembly includes a second button, a second spring and a connecting rod; the second button is provided with a connecting rod hole, and the connecting rod passes through the connecting rod hole and the pivot section waist-shaped hole and is inserted into the guide hole.

8. An improved children's luggage stroller according to claim 7, characterized in that, The second button assembly has a pair and is independently controlled; the rotating base has symmetrically distributed guide holes; the rotating shaft has symmetrically provided button slots at the upper and lower ends of its circumferential sidewall; one end of the second spring abuts against the button slot, and the other end is connected to the second button.

9. An improved children's luggage stroller according to claim 6, characterized in that, The wheels at the lower end of the rear frame are brake wheels.

10. An improved children's luggage stroller according to claim 6, characterized in that, The handrail is equipped with a hanging slot.

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